Device for forming paper yarn



g- 1954 B. M. KIMBALL 2,687,299

DEVICE FOR FORMING PAPER YARN Filed Nov. 18, 1952 a0 14 w 1 r a 19 20 I9. kg I60 INVENTOR. BENJAMIN M/L TON K/MJMZ ATTORNEY llmlllllhlllllll Patented Aug. 24, 1954 DEVICE FOR FORMING PAPER YARN Benjamin Milton Kim ball, Gilman, Vt., assignor to The Cellucord Corporation, New York, N. Y.,

a corporation Application November 18, 1952, Serial No. 321,224

1 Claim.

This invention relates to an improved forming device for yarn making apparatus.

The invention herein claimed constitutes an improvement on the apparatus shown in my Patent No. 2,505,050, issued on April 25, 1950.

The present invention enables the speed of the above-identified apparatus to be safely increased to 5000 R. P. M. On approaching such a speed with the devices of the prior art, the cord will break due to non-uniformity of cord tension and frequent turning of the cord in diverse directions. Such diverse turning of the cord, even at lower speeds, renders the prior art devices unsatisfactory for use with colored paper yarn, as such yarn has different colors on opposite sides.

Accordingly, it is a principal object of the present invention to provide a highly improved paper yarn forming device for use with cord-making apparatus, which device will allow the apparatus to operate at a substantially increased speed.

Another principal object of the present invention is to provide a paper yarn forming device for use with cord-making apparatus which will hold the yarn under constant tension and which will prevent the yarn from turning in diverse directions.

It is another object of the present invention to provide a forming device for paper yarn which folds the edge portions of the yarn under the adjacent central portions, the edge portions extending away from each other.

It is still another object of the present invention to provide a paper yarn forming device which is highly wear-resistant, and in which the elements thereof may be easily removed for repair or replacement.

It is a further object of the present invention to provide a paper yarn forming device which is simple and eificien-t in operation, and economical to manufacture and sell.

Other objects of the present invention will become apparent upon reading the following specification, and referring to the accompanying drawings, which form a material part of this disclosure.

The invention accordingly consists in the features of construction, combinations of elements, and arrangements of parts which will be exemplified in the construction hereinafter described, and of which the scope will be indicated by the appended claim.

In the drawings:

Fig. 1 is a front elevational view of a. paper yarn forming device constructed in accordance with the present invention, showing the device mounted on a horizontal supporting member, and showing a strip of such yarn extending through and beyond the ends of the device.

Fig. 2 is an end view of the device of Fig. 1, the strip of yarn not being shown.

Fig. 3 is a rear elevational view of the device shown in Fig. 1.

Fig. 4 is an enlarged end elevational view of a slightly modified form of th device.

Fig. 5 is an enlarged front elevational view of the form shown in Fig. 4. v

Fig. 6 is a. sectional view taken on the line 6-43 of Fig. 4. 1

Fig. '7 is a top view of the former of the present invention as removed from the device. i

Fig. 8 is a fragmentary view of a strip of paper yarn partially folded.

Fig. 9 is a sectional view taken on the line 9-4! of Fig. 8.

Referring now more particularly to the drawings, the yarn forming device of the present invention comprises generally a die it], a former II disposed within the die, and a holder'iZ in which the die and former are removably seated and which is adapted for securement to a supporting element l3.

The die I0 embodies a generally tubular member l4 having a conical opening l5 extending inwardly from one end It. The opening l5 converges or tapers inwardly from the end it to a point I I which is adjacent to and spaced inwardly from the end I8 of the member Ill. Extending inwardly from the end [3, in axial alignment with and opening into the opening i5 is a bore or opening extension I9. Thus, the member M is provided with a through opening constituted by conical opening l5 and bore I9, the through opening having convex surfaces. Exteriorly, the member I4 is substantially cylindrical in shape and has its sides converging at 20 adjacent the end [8. The converging portion may be conical, as shown in Fig. 1, or may be spherical as at 28 in Fig. 6. It has been found preferable to fabricate the die member M of plastic. However, it is appreciated that metal or other wear resistant material may be used.

Arranged within the opening 15 of the die member I4 is the former l I. The former includes a frusto-conical body 25 which is arranged within the opening ii. The body 25 has its smaller end 26 extending into the opening l5 and has its larger end 21 adjacent the end l6 of member H. The body 25 is disposed longitudinally and eccentrically with respect to the member id, as best seen in Fig. 6. An arm 28 extends transversely outwardly from the body 25 adjacent the end 21. The arm 28 may be fixedly secured to the body 25, as by Welding, or integrally formed with the body 25, as shown in Fig. 6. On the free end of arm 28 is a longitudinally extending strip or plate 29 having one end fixedly secured to or integrally formed with the arm 28, and having its other end extending longitudinally of and beyond the end 26 of body 25. It is seen that strip 29 extends along and abuts the outer surface of die member M, the arm 28 being of sufiicient length to properly space the body 25 from the interior concave surface of the member is. The convex surface of the body 25 and the concave surface of the opening I cooperate in a novel manner which will be more fully described hereinafter. Thus, the former H includes the body 25, arm 28 and strip 29. r

In order properly to support and position the die it! and former H, the holder i2 is provided, which includes a disc 35 having a bolt 36 on one face 31. The bolt 36 has its free end threaded and is adapted to extend through the supporting element i3 and receive a nut 33 for securing the holder to the supporting element. On the other surface 39 of disc 35 is an upstanding ear 30 which is provided with a transversely extending through aperture 45 for receiving the die memher it and former I l. Extending inwardly through one side of the ear 45 is a threaded aperture-42 which opens into the opening Iii. The aperture 42 threadedly receives a fastener or set screw 53, which engages the strip 29 and holds the former I! and die H9 in position. Another fastener or set screw M may extend downwardly through ear id and engage with the die member M to hold the latter in any selected position. Preferably the through opening ti is formed to conformably receive the die it and former Ii. Under certain circumstances, it has been found desirable to taper the external surface of die member i l and the internal surface of through aperture H, the taper extending from end [6 of die member toward end 18 thereof. Thus, if the set screws 53 and M were jarred loose during operation, the die it would be wedged into the holder 12, for a reason to become apparent hereinafter.

In operation, the yarn, which may be a paper strip, extends and is drawn through the die member Hi into end i5 and out of end it. The concave surface of opening 15 urges the paper strip or tape to curl around the concave surface of body 25 and as the opening l5 converges, the longitudinal edge portions 5| and 52 are folded over upon the adjacent portions 53 and 54 which are in turn folded over upon the central portion 55. Thus it is seen that the edge portions 5! and 52 extend outwardly or away from each other. It is also seen that only one surface 56 of the paper yarn is exposed after the folding operation. This is essential when using colored yarn, as the color is different on opposite sides. This manner of folding will also increase the strength of the yarn, as it is three-ply thick at all points.

If it becomes necessary to remove the former H or die i0, this may quickly and easily be done by loosening the set screws 43 and 44, and sliding the former and die out of the ear it. The former and die are separate and held together by the engagement of set screw 43 with the strip 29. If the set screws come loose during operation, and the die member i l and opening ii are tapered from end 16 of die member M toward end [8, it is seen that the force of the paper moving inwardly through end [6 would retain the die membar is and former II in their proper positions.

From the foregoing, it is seen that the present invention enables a cord-making machine to operate at substantially higher speed by always folding the yarn in one direction, and holding the yarn under constant tension.

Although the present invention has been described in some detail by way of illustration and example for the purposes of clarity of understanding, it is understood that certain changes and modifications may be made within the spirit of the invention and the scope of the appended claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

In a paper yarn twisting device having a paper tape supply reel and a rotatable drum for receiving tape from the supply reel and twisting the same, a. forming device interposed between said supply reel and said drum, said forming device comprising a die having an opening through which the tape may be drawn, said opening converging toward its outlet end and having a cylindrical bore communicating with the smaller end of said opening, a conical former disposed eccentrically of and within said conical opening and tapering toward the outlet end thereof and cooperating with the die to fold said tape, said conical former terminating short of the line of juncture between the said opening and the cylindrical bore; an arm secured on the base of the conical former and extending radially outwardly thereof and having a right-angled extension on said arm extending along and abutting the outer surface of the die member parallel to the longitudinal axis thereof, a holder having on one end a threaded stem for engagement with a supporting element and on its opposite end an ear or thimble which has a transverse hole extending at right angles to the longitudinal axis of the stem, said ear embracing the die member, a set screw extending through the ear from the outside for removably positioning the die member in said ear and for impingement against said extension of the arm of the former.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 47,632 Goebel May 9, 1865 523,833 Ferry July 31, 1894 983,388 McKane Feb. 7, 1911 2,564,895 Griswold Aug. 21, 1951 

